<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <html>
    <head>
        <title>Title</title>
    </head>
<body>
<form method="post" action="demo.do">
    <button>提交</button>
</form>
</body>
</html>
